Shell

Before entering the ADB shell into the Linux shell environment in CMD, you need to open the Android emulator (this article is for the emulator, not the real machine). If the emulator is started and the Error:device not found error message appears

I. Condition testing: Test [The command test or [can test whether a condition is true, if the test result is real, the exit status of the command is 0, if the test result is false, the exit status of the command is 1 (note the exact opposite of the

1.BASH (Bourne again Shell)cmd1; cmd2 equals to CMD1CMD22.echo Music; The semicolon is not printed because the semicolon defaults to the command-bound symbol3. Use Pgrep to identify process environment variables[Email protected] shell]$ pgrep compiz4

Conditional Judgments in shell scripts 1.if [Condition];thenStatementFi2.If [Condition];thenStatementelif [Condition];thenStatementElseStatementFi Note the point:1-1. If and fi are paired, a syntax error occurs when

Command substitutionIn bash, $( ) and ` ` (anti-quote) are used for command substitution.command substitution is similar to variable substitution, which is used to reorganize the command line, complete the command line in quotation marks, and then

One, if condition statementFormat:An IF condition expressionThen #当条件为真时执行以下语句Command Listelse #为假时执行以下语句Command ListFiIf statements can also be nested usingIf condition expression 1ThenIf condition expression 2ThenCommand ListElseIf condition

https://sourceforge.net/projects/opensourcefile/files/Nginx is a high-performance HTTP and reverse proxy server. Nginx in reverse proxy, rewrite rules, stability, static file processing, memory consumption and other aspects of the performance of a

First Script[email protected] script]# cat-N sh01.sh1#!/bin/Bash2#Program:3#This program Shows"Hello world!" inchyour screen. 4Path=/usr/local/java/jdk1.8.0_91/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/root/bin:~/bin5export

Http://blogs.interfacett.com/how-to-run-the-exchange-management-shell-ems-in-powershellConnect to Exchange servers using remote PowerShell1. Can use the following versions of Windows: Windows P style=

A variable is a quantity whose value can vary; In essence, a variable name is a memory space for storing data;The variables have local variables and environment variables;A shell variable is a weakly typed variable that does not need to specify its

Functions: functionProgram programming: Code reuse;Modular programming;Structured programming;Consider the code of an independent function as a whole, and take a name for it; a named code snippet, which is a function;Definition and use of

Recently in the Zabbix, the company has six new servers. When the Zabbix client is deployed, the baby is really angry. Grandpa's always so repetitive work is also not AH. But as a war five slag, what else can be mixed with rice? Think of last year

I rookie a, first contact with the Linux shell script;Shell script, the simplest function is to write a lot of instructions together, so that users can easily be able to execute multiple commands, and shell script provides arrays, loops, conditions

The operation of a numeric variable: The numerical operation of the shell variable is mostly used in the process control of the script, in the shell environment, only a simple integer operation, does not support the fractional operation,

1. Backgroundthe role of the shell is to explain the execution of the user's commands, the user enters a command, the shell interprets the execution of one, which is called Interactive (Interactive), and the shell has a way of executing the command

　　Quotation marks are often used when writing shell scripts, and sometimes the difference between single and double quotes is always forgotten.So just tidy up for the future when the brain is not good to come to review. First, what they have in

The shell supports only integer operations. Typically let, expr, declare, $[] are implemented.More accurate calculations suggest using the BC tools under Linux-a high-precision computing language.1. let is a shell built-in integer operation command#

a,[] single and double bracketsBasic elements:[] Two symbols should be separated by a space aroundThere is a space between the internal operator and the action variable: such as ["a" = "B"]String comparisons in,> \ [] in the string or ${}

The first four methods are to remove some characters, and the last four methods to preserve certain characters1, # Intercept, delete the left character, retain the right charactervar= "Hello World"Echo ${var#*l}Results:Lo Worldwhere Var is the

The training reference for the basic linear table of data structure in small white book is taken from UVATopic Connection http://acm.hust.edu.cn/vjudge/problem/19299Virtual judge, you can go to register.Thinking of solving problemsTry to solve the